4. You may alternate between Polygonal and Freehand Lasso [L], while you are creating aselection, by holding down the Alt key.

5. Use the Space Bar to move a selection while drawing it.

6. Holding the Shift or Alt keys to add or subtract from a selection is fairly common knowledge,but did you know that you could hold down Shift and Alt together to intersect two selections?Tip: Ctrl-click on a layer thumbnail (in the Layers palette - to load its transparency channel) andthen Ctrl+Alt+Shift-click a second layer to intersect the two layers' transparency masks.

7. Retain your selections while scaling or duplicating an image by first switching to Quick Maskmode [Q] (or click on the Quick Mask icon near the bottom of the toolbar).

8. Alt-click the Quick Mask button to toggle between masked or selected areas.